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E. P. JONES. ROCK DRILL OPERATING MECHANISM.

v APPLICATION FILED NOV. I. 1918- 1,314,81 1.

Qwventoz allow,

Patented Sept. 2, 1919.

3 SH,EET $-SHEET I E. F. JONES.

Patented Sept. 2, 1919,

3 SHEETST-SHEET 2;

APPLICATION FILED NOV. 1. 1918.

ROCK DRILL OPERATING MECHANISM.

amen/[3oz lsdwar-d' W ANOGRAIII C0., WASHINGTON. I)v C Tm: COLIIMIIM l'l.

E. P. JONES.

ROCK DRILL OPERATING MECHANISM.

* APPLICATION FILED NOV. 1, I9I8. 1,314,81 1

awuemtoz 4 404 r 7 2?]57 K (Hummus Patented Sept. 2, 1919.-

3 SHEETS-SHEET 3 MM 7%? (a. "/9. 7

Tm: CoLuMnm ILANUGRAI'II cm, WASHINGTON. n. c"

UNITED STATES PATENT OFFICE."

EDWARD P. JONES, OF BRECKENRIDGE, COLORADO.

ROCK-DRILL-OPERATING MECHANISM.

j Breckenridge, in the county of Summit and State of Colorado, have invented certain new and useful Improvements in Rock-Drill- Operating Mechanism, of which the following is a specification.

This invention relates to means for operating a drill for boring rock and mineral f and has for its object to provide an essentially high powered mechanism which will operate a drill by a rotary motion,

solely, or by a combined rotary and driving 'mer and operating means whereby to 1mpart a rotary or a combined rotary and reaction, the mechanism embodying a hamciprocating movement thereto, the change being efi'ected without requiring the drivmg means to be stopped or thrown out of action.

The drawing illustrates a preferred embodiment of the invention, however, it is to be understood that in adapting the same to meet different conditions, various changes in the form, proportion, and minor details of construction may be resorted to without departing from the nature of the invention as claimed hereinafter.

Referring to the accompanying drawings,

' I Figure 1 is a side view of a rock drill operating mechanism embodying the invenf tion,

Fig. 2 is a front end view, F1g. 3 s a rear end view, 'Flg. 4: 18a central longitudinal section on j the line 4.4 of Fig. 3 looking to the right as indicated by the arrows,

of dog provided to cooperatewith the ham- "formed in the innerside of the ring 12 Fig. 5 is a transverse section on the line 5 5of Figfl looking to the left as indicated by the arrows,

Fig. 6 is a perspective view of one form mer,

Fig. 8 is a perspective view of a modified Fig. 9 is a perspective view of part of the means for tensioning the rebounding hamopening formed in the enlargement 3. The

mer operating spring,

,Fig. 10 is a sectional detail showing the "means for adjusting and holding the sprin justed position,

Specification of Letters fPatent.

Fig. 11 is a perspective view of the dog provlded to cooperate with the ratchet bar of the spring tensioning means, and

F 1g. 12 is a perspective view of the lever provided to cooperate with the dog illustratedin Fig. 11. p

' Corresponding and like parts are referred to in the following description and indicated 1n the several views of the drawings by like reference characters. y

The numeral 1 designates a shell or suitable support for receiving the drill operat-' ing mechanism which is secured thereto in any preferred way.

The drill operating mechanism comprises a body or barrel 2 which may be of any construction and relative size. An enlargement 3 is provided intermediate the ends of the barrel or body 2 and preferably consists of an integral part thereof. An enlargement 1 is formed at one end of the body 2 and a flanged rim 5 is secured thereto in any manner. A head 6 is slidably fitted on the opposite end of the body 2 and is formed with an inner extension 7 which constitutes an annular stop to prevent outward displacement of a spindle 8 to which thedriving means is adapted to be coupled in a manner well understood. A ring 9 is secured to the outer face of the head 6 and has a snug fit upon the projecting end of the spindle 8. A ring 10 is secured to the inner'face of the head 6 and has a close fit upon the end of the body 2. As indicated most clearly in Fig. 4 gasket or packing ll 18 disposed near opposite faces of the head thereby preventing rotary movement of the 'ringon the body. Rods 15 connect the ring 12 with the head 6 to cause both to move in unison. ring 12 and is adapted to be engaged with A bail 16 is connected with the a hook17 at one end of a rack bar 18 slidably mounted on the body 2 and within an is located within an end portion of the body Patented Sept. 2, 1919.

Application filed November 1, 1918. Serial No. 260.677.

2 and surrounds the spindle 8 and is con fined between the inner end of the hammer and a shoulder '21 formed on the spindle near the outer end thereof and adapted to engage the inner'extension 7 ofthe head 6.

The head 6 has a limited longitudinal movement on the rear endof the body 2 and effects a corresponding, movement of the spindle 8 thereby compressing the spring g23-and its teeth. are adapted to mesh with 119' to a greater or less extent as maylbe required.

; 1 A lever 22 is pivotally connected at its rear end to the enlargement ,3 by meansof a pin 23 and receives a dog 24:. A pinion or :toothedwheel 25 is mounted upon'the pin the teeth of the rackbar 18 and adapted to be engaged by the rear: end of the dog 24,

When the dog 24;:is in engagement with the pinion or toothed wheel 25, as indicated in Fig.1,(), and the forward end of the lever V 22 is moved outward fron the body 2, the

pinion 25'is rotated and effects a longitu dinal movement of the rack bar 18and a corresponding movement of the head 6, there- 1 by tensioni'ng the spring '19. A. dog :26

Lmounted'in the enlargement 3 engages the rackbar 18 and holds the same in-theadjusted position. In the normal position of the lever 22bit lies against the body 2 and isretained inposition by meansof acatch' -27 Thedog 26 has aflange stem 28 which receives a spring 29 housed by means of a cap 30 closing the radial opening formed A lever 31 cooperates Iwiththe dog 26 and enables the same to be moved outward when in the enlargement 3 to receive the dog 26.

it is required to release therack bar 18 so 7 that itmay move rearward when an outward movement of the head 6 is desired; The in-' ;ner end of thelever 31 engages'the flange onithe :stem28 as. will be, readily compre hended. V r The hammer 20 has an extension 32 which a body of the hammer is chambered as indi- ,1 -cated at 31 and receives a spring 35 which V'is adapted'to supplement the action of the isformed witha spiral groove33 and which is of less diameter than thejhammer; The

spring 19 in causing the rebound of the hammer. The a chamber 34 extends longitudi portion ofthe spindle 8 which is of corre Isponding shape cross section whereby V I :the spindle and hammer are- ;caused to turn ofthe hammer-having a longitudinal-movementon the splndle to compress the springs I causes, a rebound of'the hammer and tan],

'nally of the hammer -and is of non-circular form in cross section" to receive the inner as one part while at the same timeadmitting 19 and 35 which when suddenly released -impa ct beingdelivered upon the. drill or boring tool. -As indicated most c'lea-rly in Eigs. 5 'andf7.thechamber-or opening-34 J is of hexagonal form in cross section, but

groove 39.

it is obvious that the chamber may be of any non-circular outline to cause the ham- 7 'mer and spindle to rotate together. The

spring 19 is confined between the inner end 2 of the hammer 20 and the shoulder 21 of the spindle 8. Thespring 35 is confined between the inner end of the spindle 8 and Openings 36 are formedin the forward end of the hammer at the base of the reduced portion 32 whereby to make provision for ingress and egress of air and a' lubricant. An opening 37; is formed in the spindle 8 and extends through the inner end of the spindle and through a side thereof and-also the inner end of the chamber oropening 34.

provides for ingress and egress of a lubri- .cant and air-in the operatlng of -a mechanism.

of the hammer formed .with the spiral" ratchet mechanism commonly provided in stroke of the hammer. The pitch of the By having the reduced endor 32 785, groove. 33 provision is had for operating the 1 connection with. a drill chuck, whereby a vdrill or boring toolmaybe turned ateach groove 33 may vary as required. The drill chuck, not shown, is adapted to be connected to the body of the mechanism by means of v rods 38.

The body of the hammer2O iswformed with a spiral groove 39 'the wallsjof which may be parallel, or oppositely inclined depending upon the particularform of the dog provided to cooperate therewithas shown in Figs. 6 "and 8. Fig. 8 shows a. 1 dog having parallel sides and when a dog} of this form is provided the; walls of the two dogs areiprovided but it is obvious that .thenumbermay vary. The dog is indicated generally at 40 and its 5 inner end is made' .concave to conform to the circumference of the hammer so. .as-to. obtain an" extended. i

bearing against. the walls of -the spiral largement 31and suchopenings are-closed at their outer sends by inean s of caps. 41.

Springs 42 press the dogs 40 inward. .Each of the dogs- 4c0flhasga projection 43j-at its outer end to receive-the inner end otthe' 7 clearly in .Fig. 6 and having its innerv end enlarged .as ,shown at a l, has its projecefi" spring 42. The form of dog indicated most The dogs 40 are mounte'd in, a radial openings formed in the annular ene' tion 43 formed with autopening 45 toreceigve V a wire or other element when'placing the 1 dog in position. Referring to Fig; i it"will" be noticed that the inner ends of the radial openings provided in the enlargement 3 are enlarged to receive the extended ends 44 of the dogs 40,- hence when placing such dogs in position they must be drawn into the body 2 thence outward through the radial openings formed in the enlargement3 and this operation is effected by passing a wire or like element through a radial opening of the enlargement 3 and outwardlythrough the body 2, the projecting end of the wire being engaged with the opening in the projection 43 of the dog. A pull upon the wire or like part draws the dogs into the body 2 hence outward to the radial opening to the enlargement 3 as will be readily comprehended.

The spiral groove 39 extends preferably in areverse direction to the spiral groove 33 and its'ends merge into the sides of thehamdeliver a blow upon the drill or boring tool.

When the hammer is at the limit of its outward stroke the dogs are about in line with the inner end of the spiral groove 39 so as to gradually enter said groove and in the rota- "of the dogs into the 'tion of the hammer cause the latter to move inward and compress the springs 19 and 35. The groove39 widens at its ends to insure there-- with One wall of the groove 39 at the inner en'dthereof is beveled, as indicated at 46,

the purpose being to facilitate the entrance groove. and this is of special advantage when the walls of the groove are undercut.) The forward wall of the groovev 39 near the inner or rear end "thereof has a portion beveled as indicated at 47 to provide clearance to'enable the dog to ride upon the inclined rib during a partial revolution of the hammer should they fail at first to enter the groove 39 so that during the next revolution of the hammer .the dogs will enter the groove and perform the function of drawing the hammer into the body or barrel 2 against ,the. tension of the reboundin springs 19 and 35. When the hammer .reac es a position in its rearward travel to cause the dogs 40 to ride out of the groove 39 the rebounding spring pressure instantly comes into play and throws the hammer-forward;so as to deliver a blow upon the drill tool and during the rebound or forward movement of the hammer the dogs clear the groove 39 and ride upon theouter edges of the spiral fin. or rib formed as a result of the groove 39. It has been found that the movementof the hammer is eflected so quickly that the dogs will not enter the groove even though the groove and dogs are of a like width as in the case of the sides of the dogs and the walls of the groovebeing parallel. To preclude any possibility of the dogs entering the groove 39 during the re bound of the hammer it is preferred to have the walls of the groove 39 outwardly converged and the inner ends of the dogs flared, as shown most clearly in Figs. 4 and 6. This results in having the outer side of the groove 39 of less width than the inner portion.

In some cases it may be desirable todisp'ense with the impact of the hammer upon the boring tool or drill and to impart a ro tary movement of the tool solely. This is effected by restraining means for holding the whereby to simultaneously operate such pins into or out of engagement with the dogs 40. Then the dogs are held near the groove 39 the crank lever 50 ismoved to throw the pins 48 inward so as to engage the dogs 40 and hold them in outward position as indicated in Fig. 4. In this position of the dogs the hammer is rotated simply without having any reciprocating movement imparted thereto. When the dogs 40 are released and permitted to act in their usual way they enter the inner end of the groove 39 and as the hammer is rotatedcause the same to move inward against the tension of the rebounding springs. When the hammer reaches its inward travel the dogs 40 clear the outer end of the groove 39and the hammer is projected by the rebounding action of the springs 19 and 35.

It is proposed to make provision for properly lubricating the parts and for this purpose openings are formed in the body and preferably in the enlargement 3 and such openings are closed by plugs 51. The rear portion of the body may be provided with intercommunicating valve controlled openings 32 whereby a suitable fluid medium may be, supplied to the boring if desired. The driving power is adapted to beconnected to the spindle 8 in any manner and a suitable drill chuck is adapted to be connected to the body by means of the rods 38.

The foregoing description and the drawings have reference to what may be considered the preferred, or approved, form of my invention. It is to be understood that I may make such changes in'construetion and arrangement and combination of parts, ma-

terials, dimensions, et cetera,as may prove expedient and fall within the scope of the analogous boring tool, a tool operating mem I ing therein from one end,- a spindle slidappended claimsu; r V p described my invention,

what I claim as new and desire to secure by Letters Patent is r- 4 -Having thus fully 1.;In means for operating a'roclrdrill or her vhaving av longitudinal opening extendable within the opening of the tool operat ing member and rotatable :therewith, a

spring withinthe opening ofthejtool operh ating member and confined between the same I and the spindle and a second springmounted on the spindle and confined between the i exterior spiralgroove, a spindle having'telescopic connections withthe hammer and rotatable therewith, a dog infcooperativerela anda rebounding spring-for projecting the same and the tool operating member.

'2. Inmeans' for operating a rock drill or analogous boring tool, a hammerlhavlng an tion with thespiral' groove of the hammer to impart a longitudinalmovement thereto v hammer when released from the dogs} I 7 .7 3. In means for operating a rock drill or analogous boringtool, a spindle, a hammer having connectionwith the spindleto rotate therewith and move longitudinally thereon --I'eleased from the controlling. influence of' the dog. 1 40 V andhavingan exterior spiral groove, a rebounding springand a dogin cooperative relation with the spiral groove of the hammer to move the latter longitudinally toten,

,sion the rebounding spring which latter reacts to project the hammer the instant it is V 4. In meansforoperating a rock drill or analogous boring tool, a spindle, ahammer' having rotary and sliding connection with r spiralgroove Which'widensat itsends and the spindle and provided with anexternal spiralvgroove which vanishes into the sur- 45 face of the hammer at its forward end, a

dog in cooperative relation with the spiral groove of the hammer and a rebounding spring for projecting the hammer. V

*5. In means for operating a rockjdrill or analogous boring tool, a spindle, a hammer having rotary and sliding connection with groove, and a rebounding spring for pros vanishes into the ,side' of the hammer, a dog 7 in "cooperative; relation .with the spiral V I groove and a rebounding spring for projects i V ing t h m :the hammer.

M am

7. In means foroperatingaroch fdrillgor analogous boring tool,a spindle, a hammer having rotary. and slidin'g connection with the spindle and provided with an external spiral groove which hasthe rear wallfof its rearmost flight beveled,,,a; dogin cooperative relation with the spiral groove 1 and a. re;

analogous boring tool, a spindle,'.;ahammer;

having rotary andz sliding connection with P1 he sp d e and P ovi e i hLaHJ- Bmaboundingspring foriprojecting thehamrner. 8. .In meansforoperatingarock-drill or spiral groove the rearmost: flightldfwhieh.

has a portion ofits forwardwall beveled, a; dog in cooperative relation-with the spiral groove and r bou d ngspr ng-barrel i ing thehammer. gill-In means for opera thag,a; rock; l ou b0i t 0 slifl 1 havlng rotary, and; sliding connection with 1 the spindleand provided with .aniexte rnal ihammer. 1

spiral groove, .the \re'armostjflight'of which: has its opposite walls beveled, adog-inco operative relation with the spiral groove and}.

rebounding spring for projecting tlre,-

10.: In means'tor rock drill 1 analogous boring-tool, a spindle, a hammer having rotary and sliding connection with the spindle and provided with; an; external spiral I groove whose "ends vanish I into the c sides of the hammer, a rdogvincooperative relation with the spiral 'groove andv having its inner face o f greaterlextent than the Width of we a r ov ria Quwrsraaibo,

to preclude the'entrance of the'dogintoxthe groovegat anyppoint between the ends there'e f of and a rebounding 'spring. :for' projectingf i 11. In means or 105 analogousboring toioLla spindle, a hammer p a o "vhe e en van Y i -toi h sldes oftheham'mer, sa d groove lltLVlnggl-tS havlng rotar-y ancljsliding,conneotionfwith V the spindle and provided'with ;exterina1 walls undercut, a: dog in cooperative rela tion with the 'spiraljgroove.and havingf its 5,

inner face of greater extent thari ithe width T of the groove at its outer side and'a'rebounda 1 ing spring for projectingthe hammerle;

12- In means for operating arockqdril-l or analogous boring: tool, a hammer having its 6 end portions provided withspiral. grooves,' v 7 theone being the; reverse'ofthe-otherqand a dog cooperating withthe, spiral groovein the vmner end portionof the-,hammemto impart a longitudinal movement. thereto.

i '13. In ,meansfor' operating; diroclr-idrill or analogous *boring-tool, a hammerflhavin'g I its outer end portion: reducedv and provided W1tl1 a sp ral groove and havingitg inner portion formed with 'a'reverse spiral groove 7 V and a-dogcooperatin-g with, the inner spiral i groove to impart ani'long'itudinal movement 7 j to the hammer, c

14. In meansfor operating a rock drill or analogous boring tool, a hammer having an external spiral groove, means for im parting rotary movement to the hammer, a rebounding spring for projecting the hammer, a dog adapted to cooperate with the spiral groove of the hammer to impart a longitudinal movement to the hammer and means for holding the dog out of the path of the spiral groove to admit of the hammer rotating without having any longitudinal movement imparted thereto.

15. In means for operating a rock drill or analogous boring tool, a hammer mounted to receive a rotary and a longitudinal movement and provided with an external spiral groove, a rebounding spring for projecting the hammer, dogs cooperating with the spiral groove to impart a longitudinal movement to the hammer, restraining means adapted to engage the dogs to hold them clear of the hammer, and means for simultaneously operating the restraining means.

16. In means for operating a rock drill or analogous boring tool, a body, a hammer mounted within the body, a rebounding spring for projecting the hammer, a mem ber mounted on the body and movable longitudinally thereon for varying the tension of the rebounding spring and means for adjusting said member and holding it in the adjusted position.

17. In means for operating a rock drill or analogous boring tool, a body, a hammer mounted within the body, a rebounding spring for projecting the hammer, a member slidably mounted on the body, a longitudinally movable element having connection withsaid element and means for adjusting the longitudinally movable element and holdin it in the adjusted position.

18. n means for operating a rock drill or analogous borin tool, a body, a hammer disposed within t e body, a reboundin spring for projecting the hammer, a head slidable on the body, a rack bar mounted on the body, connecting means between the rack bar and head, means for moving the rack bar longitudinally and means for securin the rack bar in adjusted position.

19. 11 means for operating a rock drill or analogous boring tool, a body, a hammer within the body, a head slidable on the body,

Copies of this patent may be obtained for a rebounding spring for projecting the hammer, a ring slidable on the body and prevented from turning thereon and having connection with the said head, and means for adjusting the ring and holding it in the adjusted position.

20. In means for operating a rock drill or analogous boring tool, a body, a hammer within the body, a head slidable on the body, a rebounding spring for projecting the hammer, a ring slidable on the body and prevented from turning thereon and having connection with the said head, a rack bar having connection with the ring, a pinion in mesh with the teeth of the rack bar, a lever, a dog mounted upon the lever and adapted to engage the pinion to effect adjustment of the rack bar and means cooperatin with the rack bar to hold the same in a justed position.

21. In means for operating a rock drill or analogous boring tool, a body having an annular enlargement intermediate its ends, a hammer disposed within the body and having an external spiral groove, a spindle mounted within the body and having rotary and sliding connection with the hammer, a rebounding spring between the spindle and hammer, dogs mounted in the sald annular enlargement and adapted to cooperate with the sprial groove of the hammer, restraining means for holding the dogs out of action, a lead slidably mounted on the body and havin a portion in engagement with the spindfe to move the latter inward and vary the tension of the rebounding spring, a ring mounted on the body and prevented from turning thereon and having a longitudinal movement, means connecting the ring with the head, a rack bar slidable in the said annular enlargement and having connection with the ring, a pinion in mesh with the rack bar, a lever, a dog mounted on the lever and adapted to engage a pinion to move the rack bar longitudinally and means for holding the rack bar in adjusted osition.

In testimon whereof aflix my signature in presence 0 two witnesses.

EDWARD P. JONES.

Witnesses GEORGE ROBINSON, J AROL WILD.

five cents each, by addressing the Commissioner of Patents,

Washington, I). G. 

